三个臭皮匠，顶个诸葛亮
sān​gè​chòu​pí​jiang, dǐng​gè Zhū​gě Liàng

collective wisdom

三个臭皮匠，顶个诸葛亮 (三個臭皮匠，頂個諸葛亮) sān​gè​chòu​pí​jiang, dǐng​gè Zhū​gě Liàng
collective wisdom
The principle that the wisdom of a group exceeds that of a single individual; three ordinary people can match a genius when working together.

Sources
Definitions
CC-CEDICT